If I understand correctly, you want to save finished file to hard drive instead of burning to disc.
There should be an option for burning to select a burner (if you have more than one) or burn to hard drive.
If it is not there, just burn one disc and than copy VIDEO_TS folder from the disc to hard drive, that is your DVD.
I am sure Adobe will have option to save to HDD.
If, however. you want to do any modification to the file, you will have to re encode.
There should be an option to save a project in that case.
I use Premiere and all this is there.